Undav fired a wide effort as Germany struggled to break down a compact Paraguay defence, and they paid the price for it when he lost his shape before half-time, allowing Enciso to head home.
Paraguay regained possession after Neuer punched in a corner, fizzing in a cross from the right for Matias Galarza who picked out a completely unmarked Enciso.
Notably, this was Paraguay’s first goal in the World Cup knockout stage, having failed to score in their five previous matches, including a 1–0 defeat to Germany in the last 16 in 2002.
A weak first half saw Germany bring Leon Goretzka on at the break but an under-hit backpass from Joshua Kimmich forced Neuer to run and prevent Enciso from doubling the lead.